This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

A monument at Alicante Marina honors a little-known hero of the Spanish Civil War.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

This extensive collection covers thousands of years of Polish military history.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A centuries-old forgotten underworld lies beneath Malta.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

This unique Lady Liberty is one of the only examples of the figure sitting down.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

Something's watching you.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The Liverpool street made famous by the Beatles is real.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.